Network


Latest external collaboration on country level. Dive into details by clicking on the dots.

Hotspot


Dive into the research topics where Michael L. Dennis is active.

Publication


Featured researches published by Michael L. Dennis.


American Journal on Addictions | 2006

Development and Validation of the GAIN Short Screener (GSS) for Internalizing, Externalizing and Substance Use Disorders and Crime/Violence Problems Among Adolescents and Adults

Michael L. Dennis; Ya Fen Chan; Rodney R. Funk

The Global Appraisal of Individual Needs (GAIN)1 is a 1-2 hour standardized biopsychosocial that integrates clinical and research assessment for people presenting to substance abuse treatment. The GAIN - Short Screener (GSS) is 3-5 minute screener to quickly identify those who would have a disorder based on the full 60-120 minute GAIN and triage the problem and kind of intervention they are likely to need along four dimensions (internalizing disorders, externalizing disorders, substance disorders, and crime/violence). Data were collected from 6,177 adolescents and 1,805 adults as part of 77 studies in three dozen locations around the United States that used the GAIN. For both adolescents and adults the 20-item total disorder screener (TDScr) and its four 5-item sub-screeners (internalizing disorders, externalizing disorders, substance disorders, and crime/violence) has good internal consistency (alpha of .96 on total screener), is highly correlated (r = .84 to .94) with the 123-item longer scales in the full GAIN. The GSS also does well in terms of its receiver operator characteristics (90% or more under the curve in all analyses) and has clinical decision-making cut points with excellent sensitivity (90% or more) for identifying people with a disorder and excellent specificity (92% or more) for correctly ruling out people who did not have a disorder. The GSS has good potential as an efficient screener for identifying people with co-occurring disorders across multiple systems and routing them to the right services and more detailed assessments.


Journal of Substance Abuse Treatment | 2002

Preliminary outcomes from the assertive continuing care experiment for adolescents discharged from residential treatment

Mark D. Godley; Susan H. Godley; Michael L. Dennis; Rodney R. Funk; Lora L. Passetti

In many treatment systems, adolescents referred to residential treatment have the most serious alcohol or other substance use disorders and are at high risk of relapse. Upon discharge, these adolescents are typically referred to continuing care services, however, linkage to these services is often problematic. In this study, 114 adolescents (76% male) who stayed at least 7 days in residential treatment were randomly assigned to receive either usual continuing care (UCC) or UCC plus an assertive continuing care protocol (ACC) involving case management and the adolescent community reinforcement approach. ACC participants were significantly more likely to initiate and receive more continuing care services, to be abstinent from marijuana at 3 months postdischarge, and to reduce their 3-month postdischarge days of alcohol use. Preliminary findings demonstrate an ACC approach designed for adolescents can increase linkage and retention in continuing care and improve short-term substance use outcomes.


Evaluation and Program Planning | 2003

An experimental evaluation of recovery management checkups (RMC) for people with chronic substance use disorders

Michael L. Dennis; Christy K. Scott; Rod Funk

The majority of people presenting for publicly-funded substance abuse treatment relapse and receive multiple episodes of care before achieving long-term recovery. This Early Re-Intervention experiment evaluates the impact of a Recovery Management Checkup (RMC) protocol that includes quarterly recovery management checkups (assessments, motivational interviewing, and linkage to treatment re-entry). Data are from 448 adults who were randomly assigned to either RMC or an attention (assessment only) control group. Participants were 59% female, 85% African American, and 75% aged 30-49. Participants assigned to RMC were significantly more likely than those in the control group to return to treatment, to return to treatment sooner, and to spend more subsequent days in treatment; they were significantly less likely to be in need of additional treatment at 24 months. This demonstrates the importance of post-discharge recovery management checkups as a means to improve the long-term outcomes of people with chronic substance use disorders.


Journal of Substance Abuse Treatment | 1991

Cocaine use by clients in methadone programs: significance, scope, and behavioral interventions.

Ward S. Condelli; John A. Fairbank; Michael L. Dennis; J. Valley Rachal

Widespread use of cocaine by methadone clients is undermining the effectiveness of methadone treatment programs in reducing illicit drug use, decreasing criminal behavior, and slowing the spread of the human immunodeficiency virus (HIV). In response, methadone programs are implementing a range of behavioral interventions to manage this growing problem. Many of these interventions, however, have yet to be evaluated for effectiveness for reducing cocaine use among methadone clients. Interventions that are effective for cocaine use in the general population may not be as effective with cocaine users in methadone programs because these clients differ from other cocaine users in ways that are likely to affect how they respond to the interventions. This paper reviews the literature on the significance and scope of the problem of cocaine use by methadone clients and on the behavioral interventions that have been evaluated for these clients.


Evaluation Review | 2007

An Eight-Year Perspective on the Relationship Between the Duration of Abstinence and Other Aspects of Recovery

Michael L. Dennis; Mark A. Foss; Christy K. Scott

Using data from 1,162 people entering treatment and followed up (> 94%) for 8 years, this article examines the relationship between the duration of abstinence (1 month to 5 or more years) and other aspects of recovery (e.g., health, mental health, coping responses, legal involvement, vocational involvement, housing, peers, social and spiritual support), including the trend and at what point changes occur. It also examines how the duration of abstinence at a given point is related to the odds of sustaining abstinence in the subsequent year. The findings demonstrate the rich patterns of change associated with the course of long-term recovery.


Economics of Education Review | 2004

Adolescent Marijuana Use and School Attendance.

M. Christopher Roebuck; Michael T. French; Michael L. Dennis

This paper explores the relationship between adolescent marijuana use and school attendance. Data were pooled from the 1997 and 1998 National Household Surveys on Drug Abuse to form a sample of 15 168 adolescents, aged 12–18 years, who had not yet complete high school. The analysis determined the role of marijuana use in adolescent school dropout and, conditional on being enrolled, estimated the number of days truant. The potential endogeneity of marijuana use was tested in all specifications. The results indicate that any marijuana use was positively associated with school dropout and truancy in all models. However, when chronic marijuana use (weekly or more frequent) was distinguished from non-chronic marijuana use (less frequent than weekly), chronic marijuana use was found to be the dominant factor in these relationships. The results have important implications for educators, substance abuse treatment providers, and policymakers.


Addiction | 2009

Results from two randomized clinical trials evaluating the impact of quarterly recovery management checkups with adult chronic substance users

Christy K. Scott; Michael L. Dennis

AIMS Post-discharge monitoring and early reintervention have become standard practice when managing numerous chronic conditions. These two experiments tested the effectiveness of recovery management checkup (RMC) protocols for adult chronic substance users. INTERVENTION RMC included quarterly monitoring; motivational interviewing to provide personalized feedback and to resolve ambivalence about substance use; treatment linkage, engagement and retention protocols to increase the amount of treatment received. PARTICIPANTS AND SETTING Recruited from sequential addiction treatment admissions, participants in the two experiments were, on average, 36 and 38 years of age, mainly female (59% versus 46%), African American (85% versus 80%) and met past-year criteria for dependence (87% versus 76%). DESIGN Participants in both experiments were assigned randomly to the RMC or control condition and interviewed quarterly for 2 years. MEASUREMENT The Global Appraisal of Individual Needs (GAIN) was the main assessment instrument. FINDINGS RMC participant outcomes were better than control participants in both experiments. Effect sizes were larger in the second experiment in terms of reducing days to readmission (Cohens d = 0.41 versus d = 0.22), successive quarters in the community using substances (d = -0.32 versus -0.19), past-month symptoms of abuse/dependence (d = -0.23 versus -0.02) and increasing the days of abstinence over 2 years (d = +0.29 versus 0.04). CONCLUSION RMC, which provided ongoing monitoring and linkage, is feasible to conduct and is effective for adults with chronic substance dependence.


Psychology of Addictive Behaviors | 2005

The stability and impact of environmental factors on substance use and problems after adolescent outpatient treatment for cannabis abuse or dependence.

Mark D. Godley; Jeffrey H. Kahn; Michael L. Dennis; Susan H. Godley; Rodney R. Funk

Because alcohol or other drug use following adolescent substance abuse treatment is common, understanding mediators of posttreatment outcome could help improve treatment interventions. The authors conducted path analyses based on data from 552 adolescents (aged 12-18; 82% male) with cannabis abuse or dependence who participated in outpatient treatment. The analysis used the Family Conflict and Cohesion subscales, from the Family Environment Scale, and several scales and indices from the Global Appraisal of Individual Needs. Family conflict, family cohesion, and social support indirectly predicted substance use and substance-related problems as mediated by recovery environment and social risk. This model replicated across 4 follow-up waves (3, 6, 9, and 12 months postintake). These results support the idea of targeting environmental factors during continuing care as a way to improve treatment outcomes for adolescents with cannabis disorders.


Child Maltreatment | 2003

Gender differences in victimization severity and outcomes among adolescents treated for substance abuse.

Janet C. Titus; Michael L. Dennis; William L. White; Christy K. Scott; Rodney R. Funk

This article uses data from the Global Appraisal of Individual Needs (GAIN) on 214 adolescents entering substance abuse treatment. The goals of the article are to validate the General Victimization Index (GVI), examine its relationship to gender and co-occurring problems, and determine its relationship to outcomes. The GVI includes 15 items on lifetime traumatic events, traumagenic factors, and current worries of victimization. The items fall along a severity dimension (α =.88), and evidence was generated to support the construct validity of cutoff scores for interpretation. Girls were significantly more likely than boys to have experienced a variety of victimization incidents. When used as grouping variables, gender and severity of victimization significantly interacted with measures of intake status and were significant predictors of 3-month postdischarge treatment outcomes.


American Journal of Drug and Alcohol Abuse | 2000

Symptoms of Dependence, Multiple Substance Use, and Labor Market Outcomes

Jeremy W. Bray; Gary A. Zarkin; Michael L. Dennis; Michael T. French

The prevalence and costs of alcohol and drug disorders pose a serious social concern for policymakers. In this paper, we use data from the National Household Surveys on Drug Abuse (NHSDA) to estimate simple descriptive statistics and analysis of variance (ANOVA) models of the relationship between symptoms of dependence and labor market outcomes for alcohol, cigarettes, marijuana, and other illicit drugs. For men, we find that substance use with symptoms of dependence is associated with both lower employment rates and fewer hours of work. For women, we find that substance use with symptoms of dependence is associated with lower employment rates, but we find no consistent evidence of a relationship between symptoms of dependence and the number of hours worked. Finally, all of our point estimates are smaller in magnitude when we control for multiple substance use, suggesting that comorbidities play a critical role in the relationship between substance use and labor market outcomes. Our results suggest that policymakers and researchers should consider the full spectrum of substance use and dependence rather than focusing on the simple use of a single substance.

Collaboration


Dive into the Michael L. Dennis's collaboration.

Top Co-Authors

Avatar
Top Co-Authors

Avatar

Frank M. Tims

National Institute on Drug Abuse

View shared research outputs
Top Co-Authors

Avatar

Kendon J. Conrad

University of Illinois at Chicago

View shared research outputs
Top Co-Authors

Avatar

Michael T. French

Medical University of South Carolina

View shared research outputs
Top Co-Authors

Avatar
Top Co-Authors

Avatar

Karen M. Conrad

University of Illinois at Chicago

View shared research outputs
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar

Barth B. Riley

University of Illinois at Chicago

View shared research outputs
Researchain Logo
Decentralizing Knowledge